JPH05323753A - Copying device - Google Patents

Abstract

PURPOSE:To surely copy the whole of originals by comparing the number of ejected copied sheets with the number of originals that the exposure of an image is finished and displaying the number of sheets showing a smaller value as the number of sheets whose copying is finished. CONSTITUTION:When the originals are jammed, a jam display element 36 is turned off and a flag is reset to zero. Then, the content of a counter which subtracts the number of ejected copied sheets from the number of originals and stores the number of residual copied sheets is compared with the content of a counter which subtracts the number of originals which is surely copied and made to circulate from the number of originals and stores the number of residual originals which are supplied. When the content of the counter is larger, the content of the counter is displayed on a display element for the number of sheets 35 as the number of originals which are supplied besides. When the content of the counter is smaller, the content of the counter is displayed on the element 35 as the number of originals which are supplied besides.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, and more particularly to a copying machine equipped with an automatic document feeder, which is prepared after a copying operation is restarted when a fed document, copy paper or the like is jammed. The present invention relates to a copying apparatus capable of automatically calculating and displaying the number of originals to be fed after restarting so as not to run short.

[0002]

2. Description of the Related Art When a copy is made for a plurality of originals, a copying apparatus provided with an automatic original feeding device is known in order to save the labor of placing the originals one by one on the original glass of a copying machine. .. The automatic document feeder pulls out the documents one by one from the document storage unit, feeds them to the exposure position on the document glass, and exposes them while moving the documents over the stationary scanning optical system.
There is a circulation-type automatic document feeder (hereinafter, simply referred to as a document feeder) that discharges an exposed document to a document storage unit and repeats this. In this type of document feeder, only one copy is made from the document fed to the exposure position. Therefore, when making a plurality of copies, the document is fed to the exposure position. Are repeated for the number of copies.

If a jam occurs in the copy sheet before or after the image transfer in the copying operation using the document feeder, care must be taken in the restarting copying operation after eliminating the jam trouble. What must not be done is that the original has already been sent from the exposure position to the original storage portion when the jam occurs. Therefore, the original is returned to the top of the original stack in the original storage portion by the difference between the number of originals and the number of ejected copies, and the copying operation is restarted from there.

In the case where a document fed by the document feeder has a jam, a copying machine having a first-out copy mode for starting the feeding of copy sheets prior to exposure is Since the presence or absence of the original document to be exposed is detected and the feeding of copy paper is started, a blank copy sheet with no image is formed on the output tray along with the copy sheet with the image formed. Is discharged. Therefore, in this case, even if the copying operation is completed by restarting the copying of the jammed original document and the succeeding original documents, a blank copy sheet on which an image is not formed may be mixed. is there.

[0005]

By the way, in the copying work using the above-mentioned document feeding apparatus, the copying machine to be fed is used.
It is expected that jams will occur at the same time or with a slight time lag between both the document and the fed document. In this case, the restart process is performed when the copy sheet is jammed, that is, the original is returned to the beginning of the original stack in the original storage section by the difference between the number of originals and the number of ejected copies.
It is not possible to copy all the originals only by restarting the copying work from there. If a document is jammed, if the start of copy paper feeding is started for the document to be exposed next by the first copy mode, a blank copy sheet, as if an image was formed. The number of discharged copy sheets is counted as the copied sheets.
Therefore, when resuming the copying work, the number of sheets of the original document to be restarted is judged to check the ejected copy sheet, find an uncopied original document, and copy it from the original document. It required complicated work to restart the work. The present invention aims to solve the above problems.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and is an automatic document feeding for feeding documents placed in a document storage unit one by one to an exposure position and discharging the exposed documents. In a copying apparatus having a feeding device for copying an exposed original image to a copy sheet, an original sheet number counting means for counting the number of original sheets whose image exposure has been completed, and an ejected copy sheet. The copy sheet number counting means for counting the number of sheets, the number of copy sheets counted by the copy sheet number counting means, and the number of original sheets counted by the original sheet number counting means are compared. And a display means for displaying information relating to the copy completion number, with the smaller number of copies being the copy completion number based on the comparison result by the operation comparison means. It is a thing.

[0007]

When a jam occurs in both the copy sheet and the original, the number of ejected copy sheets is compared with the number of originals for which image exposure has been completed, whichever is smaller. Is displayed as the number of copies completed.

As a result, even if jams occur in both the copy sheet and the original, it is possible to surely execute copying of the entire original.

[0009]

Embodiments of the present invention will be described below.
FIG. 1 is a sectional view showing the outline of the construction of a copying apparatus embodying the present invention. In the figure, 1 is a copying machine, and 200 is a circulation type automatic document feeder (hereinafter referred to as a document feeder).

First, the copying machine 1 will be described. Reference numeral 2 is a photosensitive drum, which is driven to rotate counterclockwise by a main motor (not shown). Around the photosensitive drum 2, a charging charger 3, a developing device 4, a transfer charger 5, a separation charger 6, a cleaner 7, and an eraser 8 are sequentially arranged at intervals in the rotation direction. Will be placed. A scanning optical system 10 includes a scanning unit S composed of a slit exposure type light source 11 and a first movable mirror 12, a second movable mirror 13, a third movable mirror 14, a projection lens 15, which are held by a common holder. It consists of a fixed mirror-16. Reference numeral 9 denotes a document glass arranged above the optical system 10. Note that the scanning unit S is fixed at a fixed position when a document is exposed by the document feeding device 200 while being conveyed on the document glass, that is, a so-called follow shot exposure is performed.

Reference numeral 21 is an upper sheet feeding cassette, 22 is a lower sheet feeding cassette, 23 is a sheet feeding roller pair, 24 is a timing roller pair, 25 is a conveyor belt, 26 and 27 are fixing rollers, 28.
Indicates a pair of discharged rollers. SE5 and SE6 are copies from the upper and lower sheet feeding cassettes, respectively.
An upper paper feed sensor and a lower paper feed sensor for detecting the paper feed state of the printer, SE7 is a copy at the timing roller 24 position
A timing roller pre-sensor for detecting the sheet feeding state of the sheet, and a discharge sensor SE8 for detecting the discharge of the copy sheet whose fixing is completed.

An outline of the operation will be described. An original image continuously conveyed on the original glass 9 by the original feeding device 200 is scanned by the scanning optical system 10 and is charged by the charging charger 3. It is formed as a latent image on the drum 2. The latent image is developed and visualized by the developing device 4,
A toner image is formed on the photosensitive drum 2. Paper is fed from the paper cassette 21 or 22, and the timing roller 24
The copy sheet temporarily stopped at
The upper toner image is fed by a timing roller 24 which is driven according to the timing when it reaches the transfer position. The toner image on the photosensitive drum 2 is transferred to the transfer position at the transfer position.
The copy sheet is transferred to the copy sheet by the jeer 5, and the copy sheet on which the toner image is transferred is separated from the photosensitive drum 2 by the separation team 6. After that, the copy sheet is conveyed to the fixing rollers 26 and 27 by the conveying belt 25 and fixed, and the copy sheet on which the fixing is completed is conveyed to the discharge port by the discharge roller 28.

The document feeder 200 will be described. The document feeder 200 is arranged on the document glass 9 of the copying machine 1, and sequentially conveys the document placed on the document tray onto the document glass 9 from the last page thereof and discharges it to the document placing tray. The operation is repeated cyclically.

In the document feeding device 200, 201 is a document placing tray, 202 is a document feeding belt, 203 is a pair of document feeding rollers, 204 is a reversing guide, 205 is a document conveying belt, and 206 is a reversing roller. La, 207 is a pair of discharge rollers,
Reference numeral 208 denotes a document stopper. The document stopper 208 is moved to the operating position or the retracted position by the operating magnet 209.
Further, SE1 is a document feed sensor for detecting the feeding state of the document, SE2 is a document presence / absence detection sensor, SE3 is a document ejection sensor for detecting that the conveyed document is ejected and returned to the document placing tray, and SE4 is The document feeder is the document glass 9
The open-close sensor which detects that it was opened above is shown. In addition,
The document feeder is controlled by a control signal from the copying machine side.

An outline of the document feeding operation of the document feeding device 200 will be described. First, the original is placed on the original placing tray 201 with the back surface of the final page facing down. When a document is fed, an operation magnet 209 is used to move the document stopper 208.
Is set to the retracted position, the document feeding motor and the document feeding roller 203 (not shown) are turned on, and the document placing tray 2
01 The original placed on the original feed roller 20 is pulled out from the last page of the original by the rotation of the original feed belt 202.
3. The sheet is fed between the document conveying belt 205 and the document glass 9 via the reversing guide 204. Then, the original is conveyed on the original glass 9 by the movement of the original conveying belt 205, and the scanning optical system 10 in a fixed position exposes the original. The exposed original is conveyed from the original glass 9 to the right in the figure by the original conveying belt 205, and the reverse roller 2 is used.
06, via the pair of discharge rollers 207, the image surface of the original is discharged onto the original placed on the original placing tray 201.

Next, the operation panel of the copying machine will be described. FIG. 2 is a front view of the main part of the operation panel. In the figure, 31 is a print key for starting a copying operation, 32 is a set copy number input section for inputting a desired copy number, and is a number from 0 to 9
Tenki-32a and clear key to clear the set number of copies
32c, Stoppki-3 for stopping the copying operation in operation
It consists of 2s. Reference numeral 35 indicates the set number of copies input from the numeric keypad 32a, the number of copies remaining after the copying operation is started, and the feed position of the document tray when a document or a copy sheet is jammed. A number display element for displaying the number of originals to be returned to, and a jam display element 36 for displaying a document or copy sheet jam. When a jam occurs, the jam display element lights up and the copying machine stops its operation. Reference numeral 34 is a jam reset key for resetting a stopped state due to a jam. The jam reset key may be provided inside the front door of the copying machine and other inspection doors not shown. Jam original or copy
By pressing the jam reset key 34 after removing the jam, the jam display element 36 is turned off and the copying machine is reset to be operable.

Next, the control circuit of the copying machine will be described. FIG. 3 is a block diagram of the control circuit. 1 in the figure
Numeral 00 is a control CPU, and its input port is a key matrix 101 and a print key 31 in which a keypad 32a for setting the number of copies, a clear key 32c, a stop key 32s and other keys are incorporated. , Jam reset key 34, sensors SE5, SE6, SE7, SE8, etc. are connected. The output port has a main motor controller 10
2, scanning optical system control unit 103, developing device control unit 104, fixing device control unit 105, upper sheet feeding roller ON / OFF clutch 21C, lower sheet feeding roller ON / OFF clutch 22C, timing roller ON An ON / OFF clutch 24C, a charging charger 3, a transfer charger 5, a separation charger 6, a number display element 35, a jam display element 36, etc. are connected.

Regarding the document feeding device 200, the sensors SE1, SE2, SE3, SE4, etc. are connected to the input port, the document feeding motor control section 211, the document feeding roller ON / OFF clutch. 203C, original conveying belt ON /
The OFF clutch 205C, the document stopper operating magnet 209, etc. are connected to the output port.

Next, regarding the control operation of the control circuit,
The portion related to the present invention will be mainly described with reference to FIGS. 4 to 11.

FIG. 4 shows a control routine executed by the CPU 501.
It is a flowchart showing the outline of Chin. When the power is turned on, the control operation is started. First, the internal timer for managing the internal memory clearing, initial state setting, initial setting, and control routine processing time is set, and clocking is started (step S1). .. Then, it is checked whether or not the print key 31 is turned on (step S2), and if it is turned on, it is checked whether or not there is a document on the document feeding device 200 (step S3). If there is a document on the document feeding device, the exposure lamp 11 is turned on, the document feeding roller 203 and the document conveying belt 205 are turned on, and the document conveyance is started (step S4). A copy sheet activation flag F1 indicating the start of sheet feeding of the copy sheet and a document feed jam detection timer TM1 for detecting the occurrence of a jam of the fed document are set (step S5). The jam correction flag F2 indicating the restart after the jam has occurred is checked (step S6), and the flag F
2 = 1, that is, if restarting after a jam has occurred, flag F
The number 2 is reset to 0, and the set number display displayed on the number display element 35 is switched to the remaining copy number display showing the number of remaining copies to be copied (step S7). Step S6
If the flag F2 is not equal to 1 in the judgment of YES, that is, if it is not restarted after the occurrence of a jam, the document number count flag F3 is set to 1, and the document number counter CT1 and the document discharged number counter CT2 are reset to 0 (step S8). ..

The document stopper 208 is set to the operating position (step S9), and the document feeding control (step S10) is performed.
The copying paper passing control (step S11), other mechanisms of the copying machine, for example, static charge removal to the photoconductor, control of the developing device, fixing device and the like (step S12) are executed, and waiting for the end of time measurement of the internal timer ( Step S13) Return to step S2. If it is determined in step S2 that the print key 31 is not turned on, or if there is no document on the document feeding device in step S3, the process immediately proceeds to step S10.

FIG. 5 is a flow chart showing the structure of the document conveyance control shown as step S10 in FIG. The document transport control is performed by the document feed control subroutine (step S21) and the document transport subroutine (step S2).
2) Original document jam determination subroutine (step S23)
Consists of. Details of these subroutines will be described below.

FIG. 6 is a flow chart showing the details of the original document feeding control subroutine shown as step S21 in FIG.

First, the sensor S for detecting the feeding state of the original document.
It is determined whether or not E1 is ON edge (step S31),
ON, that is, at the timing when the document reaches the sensor SE1,
The document feeding roller 203 is turned off to stop the document feeding, and the document feeding jam detection timer TM1 is reset (step S32). The ON edge of the sensor SE means a change of state from OFF to ON, and the OFF edge means a change of state from ON to OFF.

Prior to the start of the copying operation, it is checked whether or not the count mode for counting the number of originals is set in the state of the original number count flag F3 (step S33).
When the flag F3 = 0, that is, when the count mode is not set, the timing roller timer TM2 that determines the timing for turning on the timing roller 23 is set (step S).
34). If the flag F3 ≠ 0, that is, the count mode, the document number counter CT1 is advanced by one step (step S35).

The OFF edge of the sensor SE1 is judged (step S36), and the sensor SE1 is turned off, that is, the trailing edge of the document is the sensor SE1.
At the timing when the document has passed 1, the presence or absence of a document on the document feeding device 200 is checked in the state of the sensor SE2 (step S37). If there is a document on the document feeding device 200, a document feed jam detection timer is detected. TM1 is set and the document feeding is started (step S38). A check is made to see if the timing roller timer TM2 has finished counting (step S39). If the timing has finished, the document discharge jam detection first timer TM3 is set and the timing roller 23 is allowed to turn on.
Set 5 to 1 (step S40) and return to main routine.

At step S31, the sensor SE1 turns off.
If N edge is not indicated, the process proceeds to step S36. If the sensor SE1 does not indicate the OFF edge in the determination in step S36, and if there is no document on the document feeding device 200 in the determination in step S37, the process proceeds to step S39.

FIG. 7 is a flowchart showing the details of the original conveying subroutine shown as step S22 in FIG.
It is Original discharge jam detection first timer TM3 is checked for timed end, and if timed, original discharge jam detection second
Set timer TM4 (steps S51, S5
2). If the timing has not ended, step S52 is omitted. Then, the time counting end of the document discharge jam detection second timer TM4 is checked, and when the time counting is completed, the document discharge jam detection third timer TM5 is set (steps S53 and S5).
4). If the timing has not ended, step S54 is omitted. The reason why the first timer TM3, the second timer TM4, and the third timer TM5 are continuously used to detect the document discharge jam is to detect the jam of a plurality of documents transported on the glass.

The state of the document discharge sensor SE3 is checked (step S55), and when the sensor SE3 turns on, that is, when the document reaches the discharge portion, the discharge number counter CT2 for counting the number of documents discharged is incremented by one (step S56). ). When the jam occurs, a value obtained by subtracting the content of the document ejected number counter CT2 from the content of the document number counter CT1 is entered in the un ejected number counter CT3 that counts the number of un ejected documents (step S57).

The content of the counter CT3 is used to correct the number of copies when a jam occurs, and naturally becomes 0 when the original is normally conveyed.

The state of the document discharge sensor SE3 is checked (step S58). If the sensor SE3 is in the OFF edge, that is, at the timing when the document is discharged, it is checked whether the document number count flag F3 is 0 or not. If the value is 0, the document discharge jam detection third timer TM5 is reset (steps S59 and S60). If the flag F3 is not 0, step S60 is omitted.

Whether or not all the originals have been discharged is determined from the contents of the original number counter CT1 and the contents of the original discharge number counter CT2 (step S61). When it is determined that all the originals have been discharged, the final copy number is set. It is determined whether or not the process (step S62). This is performed by judging whether or not the content of the copy number display counter, which is being subtracted from the set number of copies, is one. If it is not the final copy number,
A timer TM6 for subtracting 1 from the copy number display counter, resetting the flag F3 to 0, and measuring the adjustment time from the time when one cycle of the document feeding by the document feeding device ends to the start of the next document feeding. (Step S6
5). In a part of the copy making process, the number of originals (the content of the counter CT1) is set in the number-of-feeds counter CT4 which indicates the number of remaining copies to be fed, and the original discharge number counter CT2 is reset to set the originals. The stopper 208 is set to the retracted position (steps S66 and S67).

The timer TM6 is checked to see if it has timed (step S68). If the timer has ended, the timer TM1 is set to start feeding the next document.
Is turned on, the document stopper 208 is set to the operating position (steps S68 and S69), and the process returns to the main routine.

FIG. 8 is a flowchart showing the details of the original jam judging subroutine shown as step S23 in FIG.
It is a chart.

First, the document jam detection processing will be described. The timer TM1 is checked to see if it has timed (step S71). If the timer has ended, it means that the original has not been fed to the predetermined detection position within the predetermined time defined by the timer TM1.
The document feeding roller 203 is turned off to stop feeding the document, the display lamp inside the print key is turned off to indicate that copying is not possible, and the jam display element 36 is turned on (step S72). Flag F indicating occurrence of document jam
4 is set to 1, and the timer TM9 for deciding the timing for turning off the other driving mechanism is set (step S73). If it is determined in step S71 that the time measurement is not completed, the process proceeds to step S74. The timer TM9 is checked to see if it has finished counting (step S74). If the timer has finished counting, the document conveying belt 205, the main motor, the timing roller 23, and the exposure lamp 11 are turned off (step S75). If it is determined in step S74 that timing has not ended, step S7
Go to 6.

The timer TM5 is checked to see if it has finished counting (step S76). If the timer has finished, it means that the document has not been discharged to the predetermined discharging position within the predetermined time defined by the timer TM5. Switch off and stop feeding the original, and turn off the indicator lamp inside the print key.
F, and the jam display element 36 is turned on (step S
77). A flag F4 indicating the occurrence of a document jam is set to 1, a timer TM9 that determines the timing for turning off the other driving mechanism is set, and the document discharge jam detection first timer TM3 and the second timer TM4 are reset (step S78).

Next, the document jam reset processing will be described. The state of the sensor SE4 that detects whether or not the document feeder 200 on the document glass is opened is checked (step S7).
9) If the sensor SE4 is ON, that is, if it is determined that the document feeding device 200 is opened, it is determined whether or not the flag F4 indicating the occurrence of a document jam is 1 (step S80).
If the flag F4 is 1, that is, if a document jam has occurred, first, the jam display element 36 is turned off, and the flag F4 is set to 0.
Reset (step S81). The number of original copies is subtracted from the number of original copies, and the contents of the counter CT4, which stores the number of remaining copies, and the number of originals are reliably copied.
The number of recirculated originals is subtracted and the remaining number of originals to be fed is compared with the contents of the counter CT3 (step S82). When the content of the counter CT3 is large, the content of the counter CT3 is displayed on the number display element 35 as the number of originals to be fed, and the counter CT3 is also displayed.
When the content of 3 is small, the content of the counter CT4 is displayed on the number display element 35 as the number of originals to be fed (steps S84 and S85). The jam correction flag F2 indicating that the number of originals to be fed has been corrected by the jam processing is set to 1 and the print key lamp is turned on to display that the copying operation can be started (step S85). ), Return to the main routine. If the sensor SE4 is not ON in the determination of step S79, it means that the document feeder 200 is opened and the reset process of the document jam is not performed, and if the flag F4 is not 1 in the determination of step S80, the document jam is detected. In any case, the main routine is immediately returned to since it did not occur.

When a document jam is detected by the above processing, the number of completed documents or the number of ejected copies of the document is smaller in consideration of the presence or absence of a copy sheet jam. The number of copies is set as the number of copies completed, and the difference between the number of originals and the number of copies completed is displayed as the number of copy retakes. Therefore, if copying is restarted from the previous document by the displayed number, the copy will be insufficient. Does not occur.

FIG. 9 is a flow chart showing the construction of the copy sheet passing control shown as step S11 in FIG. The copy paper transport control is composed of a copy paper transport subroutine (step S91) and a copy paper jam determination subroutine (step S92). Details of these subroutines will be described below.

FIG. 10 is a flowchart showing the details of the copy paper transport subroutine shown as step S91 in FIG. Check flag F1 (step S10
1) If the flag F1 is 1, that is, if the sheet feeding of the copy sheet is started, the flag F1 is reset to 0 and the timer TM7 is set (step S102).
The paper feed roller is turned on and the main motor is turned on (step S103). If the flag F1 is not 1, steps S102 and S103 are omitted.

A sensor SE5 for detecting whether or not a copy sheet is fed from the paper feed cassette 21 (or 22).
The state of (6) is checked (step S104), and the sensor SE
When the ON edge of 5 (6), that is, the sheet feed of the copy sheet is detected, the sheet feed jam detection timer TM7 of the copy sheet and the copy sheet reach the timing roller. The jam detection timer TM8 up to and the timer TM9 for deciding the timing for turning off the paper feed roller and other driving mechanisms are set (step S105). Sensor SE
If 5 (6) does not indicate ON edge, step S10
5 is omitted.

The timer TM9 is checked to see if it has finished counting (step S106). If the timer has finished, the paper feed roller is turned off (step S107). If the timer TM9 is not timed, step S107 is omitted. A sensor S for detecting that the copy sheet reaches the timing roller 23.
The state of E7 is checked (step S108), and the sensor SE7
ON edge, that is, when it is detected that the copy sheet reaches the timing roller 23, the timing roller
The timer 23 is reset, the timer TM8 is reset, and the copy sheet discharge jam detection first timer TM10 for detecting a jam on the sheet discharge conveyance path is set (step S109). If sensor SE7 does not indicate an ON edge, step S109 is omitted. Then, the flag F5 is checked (step S110), and the flag F5 is set to 1
If the copy sheet has reached the timing roller 23, the flag F5 is reset to 0 and the timing roller 23 is turned on (step S111).
If the flag F5 is not 1, step S111 is omitted. Check the state of the copy paper discharge sensor SE8 (step S
112), an OFF edge of the sensor SE8, that is, a copy.
When the sheet is discharged, the counter CT4 for counting the remaining number of copies is decremented by 1 and the copy sheet is copied.
The automatic discharge jam detection first timer TM10 is reset (step S113), and the process returns to the main routine. Step S
If the sensor SE8 does not show the OFF edge in the judgment of 112, step S113 is omitted.

FIG. 11 is a flow chart showing the details of the copy paper jam judging subroutine shown as step S92 in FIG.

First, the copy paper jam detection processing will be described. The timer TM7 is checked to see if it has timed (step S121). If the timer has ended, it means that the copy sheet has not been fed to the predetermined detection position within the predetermined time specified by the timer TM7. When the copy sheet is not fed, the timer TM13 for measuring the time required for discharging the previously fed copy sheet is set (step S122).

The timer TM13 is checked to see if it has finished counting (step S123). If the timer has finished, the main motor and the conveyor belt 25 are turned off, and the jam display element 36 is turned on. Further, the timing roller 23 and the exposure lamp 11 are turned on.
Set to FF (steps S124 and S125).

The timer TM8 for detecting jamming while the copy sheet is fed to the timing roller is checked for the time end (step S126), and if the time is over, the timer TM10 is set (step S126). S127). The time counting end of the copy sheet discharge jam detection first timer TM10 is checked (step S128).
The sheet discharge jam detection second timer TM11 is set (step S129). The time counting end of the second timer TM11 is checked (step S130).
The sheet discharge jam detection third timer TM12 is set (step S131). When the time counting of the third timer TM12 is checked (step S132), if the time counting is completed, the main motor, the timing roller 23 and the exposure lamp 11 are turned off.
F, and a timer TM14 that determines the timing for stopping the conveyor belt 25 is set (step S13).
3). Examine the time measurement end of the timer TM14 (step S1
34) When the time measurement is completed, the copy sheet jams on the conveyance path and indicates that the copy sheet has not been discharged within the predetermined time defined by the timer TM14. Therefore, the conveyance belt 25 is turned off.
And the jam display element 36 is turned on (step S1).
35). If the timer TM14 is not timed out in the determination in step S133, step S113 is omitted and the process proceeds to the destination.

Next, the reset processing of the copy paper jam will be described. It is checked whether or not the jam reset key 34 is turned on (step S136). If the jam reset key 34 is turned on, the jam display element 36 is turned off, the print key lamp is turned on, and the number of originals to be fed by jam processing is corrected. Is set to 1 (step S13).
7).

The content of the counter CT4, which stores the remaining number of copies by subtracting the number of copies from the number of originals, and the number of originals that have been certainly copied and recirculated from the number of originals, subtracts the remaining supply. The content of the counter CT3 that stores the number of originals to be printed is compared (step S13).
8). When the content of the counter CT3 is large, the content of the counter CT3 is displayed on the number display element 35 as the number of originals to be fed, and when the content of the counter CT3 is small, the counter is set as the number of originals to be fed. CT
The contents of 4 are displayed on the number display element 35 (step S1).
39, S140). If it is determined in step S136 that the jam reset key 34 is not ON, the jam reset key is displayed.
Immediately returns to the main routine to wait for is turned on.

In the case where a jam occurs in the copy sheet by the above processing, in consideration of the jam of the original document, the number of the exposed sheets of the original document or the number of the ejected copy sheets is smaller, whichever is smaller. The number of copies completed is set, and the difference between the number of originals and the number of copies completed is displayed as the number of copy retakes. Therefore, if copying is restarted from the previous document by the displayed number, there will be a shortage of completed copies. There is no such thing.

In the present embodiment, the difference between the number of originals and the number of copies completed is displayed. However, the display form is not limited to this, for example, the originals sent from the original tray 201 are displayed. The difference between the number of copies and the number of copies completed may be displayed as the number of originals to be returned, or the number of copies completed may be displayed as it is.

[0051]

As described above, according to the present invention,
Whether a document fed by the automatic document feeder is jammed, a copy sheet conveyed in the copier is jammed, or both are jammed at the same time, The smaller of the number of completed exposures and the number of ejected copies is the copy completion number, and the difference between the number of originals and the copy completion number is determined and displayed as the copy retake number. If the copy is restarted from the previous document by the displayed number, there will be no shortage in the completed copy, and the restart processing after the occurrence of the jam becomes extremely easy.

[Brief description of drawings]

FIG. 1 is a sectional view showing the outline of the configuration of a copying apparatus embodying the present invention.

FIG. 2 is a front view of an operation panel.

FIG. 3 is a block diagram of a control circuit.

FIG. 4 is a flowchart showing an outline of a control routine.

FIG. 5 is a flow chart showing the configuration of document conveyance control.

FIG. 6 is a flowchart of a document feeding control subroutine.

FIG. 7 is a flowchart of a document conveying subroutine.

FIG. 8 is a flowchart of a document jam judging subroutine.
To.

FIG. 9 is a flowchart showing the configuration of copy paper conveyance control.

FIG. 10 is a flowchart of a copy paper transport subroutine.

FIG. 11 is a flowchart of a copy paper jam judging subroutine.

[Explanation of symbols]

 1: Copier 2: Photoreceptor drum 10: Scanning optical system 34: Jam reset key 35: Number display element 101: CPU 200: Automatic document feeder SE1, SE2, SE3, SE4: Sensor SE5, SE6, SE7, SE8: Sensor

[Procedure amendment]

[Submission date] March 3, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

FIG. 4 shows a control routine executed by the CPU 501.
It is a flowchart showing the outline of Chin. When the power is turned on, the control operation is started. First, the internal memory is cleared, the initial state is set, etc. (step S1).
An internal timer for managing the processing time of the control routine is set (step S1a). Then, it is checked whether or not the print key 31 is turned on (step S2), and if it is turned on, it is checked whether or not there is a document on the document feeding device 200 (step S3). When there is a document on the document feeding device, the exposure lamp 11 is turned on, and the document feeding roller 203,
The original conveyance belt 205 is turned on to start the original conveyance (step S4). A copy sheet start flag F1 indicating the start of sheet feeding of the copy sheet, and a document feed jam detection timer TM for detecting the occurrence of a jam of the document to be fed.
1 is set (step S5). Check the jam correction flag F2 indicating the restart after the occurrence of a jam (step S
6) If the flag F2 = 1, that is, if it is restarted after the occurrence of a jam, the flag F2 is reset to 0 and the number display element 35
The display of the set number of copies displayed in is switched to the display of the number of remaining copies showing the number of copies to be copied (step S).
7). If it is determined in step S6 that the flag F2 is not equal to 1, that is, if the restart is not performed after the occurrence of a jam, the document number count flag F3 is set to 1, and the document number counter CT1 and the document discharge number counter CT2 are reset to 0 (step S6). S8).

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

Whether or not all the originals have been discharged is determined from the contents of the original number counter CT1 and the contents of the original discharge number counter CT2 (step S61). When it is determined that all the originals have been discharged, the final copy number is set. It is determined whether or not the process (step S62). This is performed by judging whether or not the content of the copy number display counter, which is being subtracted from the set number of copies, is one. If it is not the final copy number,
It is determined whether the flag F3 is 0 (step S65a),
When the flag F3 is 0, 1 is subtracted from the copy number display counter to set the flag F1 to 1 (step S65b), and when the flag F3 is not 0, the flag F3 is reset to 0 (step S65c). .. Then, the timer TM6 for measuring the adjustment time from the time when one cycle of the document feeding by the document feeding device is completed to the start of the next document feeding is set (step S65d). In some copy making processes, the number of originals (contents of the counter CT1) is set in the number-of-feeds-counter CT4 and the number-of-non-feeds counter CT11, which indicates the number of remaining copies to be fed, and the number of originals ejected. The counter CT2 is reset and the document stopper 208 is set to the retracted position (step S6).
6, S67).

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction content]

The timer TM9 is checked to see if it has finished counting (step S106). If the timer has finished, the paper feed roller is turned off (step S107). If the timer TM9 is not timed, step S107 is omitted. When the trailing end of the fed copy sheet passes the sensor SE5 or SE6 (YES in the determination in step S107a), 1 is subtracted from the unfeeding counter CT11 (step S107b).
Then, it is determined whether or not the content of the unfeeding counter CT11 is 0 (step S107c), and if not 0, the flag F1 is set.
Is set to 1 (step S107d), and the first copy of the next copy sheet is fed. The state of the sensor SE7 which detects that the copy sheet reaches the timing roller 23 is checked (step S108), and the ON edge of the sensor SE7, that is, the copy sheet reaches the timing roller 23. If it is detected, the timing roller 23 is turned off.
FF is set, the timer TM8 is reset, and a copy sheet discharge jam detection first timer TM10 for detecting a jam on the discharge passage of the copy sheet is set (step S).
109). If sensor SE7 does not indicate an ON edge, step S109 is omitted. Then, the flag F5 is checked (step S110). If the flag F5 is 1, that is, if the copy sheet reaches the timing roller 23, the flag F5 is reset and the timing roller 2 is reset.
3 is turned on (step S111). Flag F5 is 1
If not, step S110 is omitted. The state of the copy sheet discharge sensor SE8 is checked (step S112). When the sensor SE8 is turned off, that is, when the copy sheet is discharged, a counter CT for counting the number of remaining copies.
4 is decremented by 1 and the copy sheet discharge jam detection first timer TM10 is reset (step S11).
3) Return to the main routine. If the sensor SE8 does not show the OFF edge in the judgment of step S112, step S
113 is omitted.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Change

[Correction content]

Next, the reset processing of the copy paper jam will be described. It is checked whether or not the jam reset key 34 is turned on (step S136). If it is on, the jam display element 36 is turned off, the print key lamp is turned on, and the number of originals to be fed is corrected by the jam processing. The flag F2 indicating the fact is set to 1 and the unfeeding counter CT11 is reset (step S137).

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

[Procedure Amendment 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

[Procedure Amendment 8]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 11

[Correction method] Change

[Correction content]

FIG. 11

Claims (1)

[Claims] 1. An automatic document feeder for feeding documents placed in a document storage unit one by one to an exposure position and discharging the exposed document, and copying the exposed document image. In a copying apparatus for copying to a printer, an original number counting means for counting the number of originals whose images have been exposed, a copy sheet number counting means for counting the number of ejected copy sheets, Copy counted by the copy sheet number counting means
Based on the comparison result by the operation comparing means for comparing the number of sheets and the number of originals counted by the original number counting means, the smaller one of them is set as the copy completion number, And a display unit for displaying information on the number of completed copies.